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/*
* Copyright (c) 2017-2020 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef ARM_COMPUTE_OMPSCHEDULER_H
#define ARM_COMPUTE_OMPSCHEDULER_H
#include "arm_compute/runtime/IScheduler.h"
namespace arm_compute
{
/** Pool of threads to automatically split a kernel's execution among several threads. */
class OMPScheduler final : public IScheduler
{
public:
/** Constructor. */
OMPScheduler();
/** Sets the number of threads the scheduler will use to run the kernels.
*
* @param[in] num_threads If set to 0, then the number returned by omp_get_max_threads() will be used, otherwise the number of threads specified.
*/
void set_num_threads(unsigned int num_threads) override;
/** Returns the number of threads that the OMPScheduler has in its pool.
*
* @return Number of threads available in OMPScheduler.
*/
unsigned int num_threads() const override;
/** Multithread the execution of the passed kernel if possible.
*
* The kernel will run on a single thread if any of these conditions is true:
* - ICPPKernel::is_parallelisable() returns false
* - The scheduler has been initialized with only one thread.
*
* @param[in] kernel Kernel to execute.
* @param[in] hints Hints for the scheduler.
*/
void schedule(ICPPKernel *kernel, const Hints &hints) override;
/** Multithread the execution of the passed kernel if possible.
*
* The kernel will run on a single thread if any of these conditions is true:
* - ICPPKernel::is_parallelisable() returns false
* - The scheduler has been initialized with only one thread.
*
* @param[in] kernel Kernel to execute.
* @param[in] hints Hints for the scheduler.
* @param[in] inputs Vector containing the input tensors.
* @param[in] outputs Vector containing the output tensors.
*/
void schedule_op(ICPPKernel *kernel, const Hints &hints, const InputTensorMap &inputs, const OutputTensorMap &outputs) override;
protected:
/** Execute all the passed workloads
*
* @note there is no guarantee regarding the order in which the workloads will be executed or whether or not they will be executed in parallel.
*
* @param[in] workloads Array of workloads to run
*/
void run_workloads(std::vector<Workload> &workloads) override;
private:
unsigned int _num_threads;
};
} // namespace arm_compute
#endif /* ARM_COMPUTE_OMPSCHEDULER_H */
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